3d logo in AE

I made a 3d logo in cinema 4d , imported it into AE with a transparent background. It looks good! Now I want to use my logo in video's at the bottom, how do I save the logo in AE as transparent? Also how can I make this keep looping?

What do you mean by "Now I want to use my logo in video's at the bottom, how do I save the logo in AE as transparent?"

Are you saying you want to use the video file in an editing program (such as Premiere) to create a bug (little graphic in the corner of the screen)? Render a file out of AE that supports transparency. You can do a Targa image sequence or Quicktime with Animation or PNG codec. Make sure your channels in your output module are set to RGB + Alpha.

As for looping, you can probably set it to loop in your NLE. In AE, you go to your interpret footage settings for your video and set how many times you want it to loop at the bottom under "Other Options"

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well i have it in my NLE and it looks great. but I had to add it 100times to make it loop. Not really what I had in mind. Im using Premiere Pro , I have it exported from after effects as an swf, and it looks good just doesnt loop. Any suggestions?